Year	gross (GPI)
1973	0.813009977340698
1974	0.785790026187897
1975	0.775170028209686
1976	0.760060012340546
1977	0.77030998468399
1978	0.738080024719238
1979	0.690270006656647
1980	0.667230010032654
1981	0.620739996433258
1982	0.64903998374939
1983	0.66619998216629
1984	0.674290001392365
1985	0.656750023365021
1986	0.630800008773804
1987	0.632269978523254
1988	0.649640023708344
1989	0.674579977989197
1990	0.689310014247894
1991	0.727140009403229
1992	0.751010000705719
1993	0.772109985351562
1994	0.753849983215332
1995	0.751089990139008
1996	0.750100016593933
1997	0.784240007400513
1998	0.828149974346161
1999	0.87567001581192
2000	0.891950011253357
2001	0.869189977645874
2002	0.910309970378876
2003	0.91593998670578
2004	0.944639980792999
2005	0.952049970626831
2006	0.994090020656586
2007	1.03793001174927
2008	1.05412995815277
2009	1.07191002368927
2010	1.08367002010345
2011	1.09396994113922
2012	1.11861002445221
2013	1.13680005073547
2014	1.1513500213623
2015	1.16120994091034
2016	1.17742002010345
2017	1.17855000495911
2018	1.1826399564743
2019	1.18511998653412
2020	1.16981995105743
2021	1.15900003910065
2022	1.14684998989105